A collection of both smutty and fluffy fics, in which you are not yet old enough to read if you don't know the definition of yaoi. Therefore, if you don't know the definition then here it is: The Urban Dictionary Definition: Yaoi is a slang meaning 'boys love' or homosexuality that is used in the japanese language. Popular with fangirls who like their favorite anime guys to kiss. Google's Definition: yaoi. Noun. (uncountable) (slang, pornography, anime, manga) A form of hentai involving two or more males in a homosexual relationship, primarily intended for a female audience. And that pretty much sums it up. Now you know what yaoi is kiddos.